Which of the following is not a source of carbon for the carbon cycle?
A)shells of marine organisms
B)oil
C)detritus
D)fertilizer

Question

Quizplus · Accepted Answer

Fertilizer is not a source of carbon for the carbon cycle. It is a substance added to soil to supply nutrients for plant growth, but it does not act as a source of carbon in the way that shells of marine organisms (which can contain carbonates), oil (a fossil fuel formed from ancient organic matter), and detritus (dead organic matter) do. These other sources directly contribute carbon to the cycle through decomposition, combustion, or sedimentation processes.

Which of the Following Is Not a Source of Carbon